Bottom Gusset Orientation in Flexible Web Packaging
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Solution Overview
Problem
Conventional bottom-gusseted packages are limited in height by the width of the polymeric film web, restricting their maximum height and versatility in formation.
Innovation Solution
A method of forming bottom-gusseted packages with the gusset positioned transversely to the longitudinal axis of the film web, allowing for packages of any selected height, using a flexible web folded to create front and rear panels with a bottom gusset extending inwardly and upwardly, and formed using a form, fill, and seal machine with sleeve-forming webs that do not heat-seal to themselves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bottom gusset is formed by pleating the web parallel to the longitudinal axis, then the package structure is simple and easy to manufacture, but the maximum height of the package is limited by the width of the polymeric web
Solution Approach 1:
The bottom gusset is repositioned from a longitudinal configuration (parallel to web axis) to a transverse configuration (perpendicular to web axis). This dimensional change allows the gusset to be formed across the width of the web rather than along its length, thereby enabling packages of any selected height without being constrained by web width limitations.
Solution Approach 2:
Instead of forming the bottom gusset by pleating the web in the conventional longitudinal direction, the invention inverts this approach by positioning the gusset transversely across the web. This inversion fundamentally changes the formation geometry, allowing the web to be folded and sealed to create packages where height is no longer restricted by web width.
2Length of moving object
If the polymeric web width is increased to achieve greater package height, then the maximum package height increases, but the equipment complexity and handling difficulty increase
Solution Approach 1:
By repositioning the bottom gusset from longitudinal to transverse orientation, the invention decouples package height from web width constraints. This allows standard-width webs to be used to create packages of varying heights, eliminating the need for specialized equipment designed to handle excessively wide webs.
3Device complexity
If the bottom gusset width corresponds to the web width, then the package structure is simple, but the package height is restricted
Solution Approach 1:
The bottom gusset is repositioned from a longitudinal configuration where its width corresponds to web width, to a transverse configuration where it extends across the web width perpendicular to the longitudinal axis. This dimensional repositioning allows the gusset to provide structural support while enabling packages of any selected height without restricting height based on web dimensions.
Solution Approach 2:
The invention segments the package structure by separating the bottom gusset formation from the longitudinal web continuity. The transverse gusset is formed as a distinct feature that can be independently dimensioned, allowing the package height to be determined by web length rather than web width, thus providing greater design flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and versatile formation of bottom-gusseted packages of varying heights without the limitations of the film web width, facilitating self-standing configurations and efficient packaging processes.
Implementation Method 1
the flexible web being joined to itself along a seam which extends parallel to the longitudinal axis of the flexible web
Implementation Method 2
a bottom gusset positioned between the front and rear package panels, with the bottom gusset extending upwardly and inwardly from the lower edges of the front and rear package panels
Data Source
AI summary
A bottom-gusseted package comprises a package body, and a bottom gusset positioned transversely of a longitudinal axis of the package body. Formation of the bottom-gusseted package is effected by positioning individual sleeves transversely of the longitudinal axis of a flexible web which forms the package body. During package formation, the flexible web is cut to form individual packages, with each individual sleeve positioned to form a bottom gusset in a respective package.